$368 Flights from Champaign (CMI) to San Francisco International (SFO)

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Flight deals from Champaign to San Francisco International

Looking for a cheap last-minute deal or the best round-trip flight from Champaign to San Francisco International? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from Champaign to San Francisco International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Champaign to San Francisco International flights are currently cheapest in February.

Champaign to San Francisco International: Alternative routes

Compare routes from Champaign to San Francisco below. You may find an airport to fly into that's cheaper, faster, or easier than San Francisco International.

Champaign to San Francisco: Flight information

The things to know before you go.
Cheapest flight found$368
Cheapest month to flyFebruary

Finding cheap flights from Champaign to San Francisco International: Frequently asked questions

The best price we found for a round-trip flight from Champaign to San Francisco International is $448. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Champaign to San Francisco International. But we found flights with one or more stops from $448.
There are no flights flying from Champaign to San Francisco International, as of December 2025.
The cheapest month to fly from Champaign to San Francisco International is usually January.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Champaign Airport to San Francisco International Airport on Thursday, January 8, 2026.
No airlines currently offer direct flights between Champaign Airport and San Francisco International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Francisco International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, American Airlines offers the cheapest flight tickets to San Francisco International.

Traveling from University of Illinois Willard Airport (CMI) to San Francisco International Airport (SFO): what you need to know

  • San Francisco's timezone is UTC-7, making San Francisco two hours behind Champaign.

  • Arrive at the airport on time so you don't miss your CMI to SFO flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to prevent a last-minute sprint to your gate.

  • Be prepared for longer queues during popular months such as August. Arriving up to four hours ahead of an international flight and two hours for domestic departures is a good idea.

  • If you'd like to tour a different city along the way, consider a flight with a stopover. To see your options for tickets from University of Illinois Willard Airport to San Francisco International Airport, deselect 'Direct flights only.' O'Hare International Airport is a well-known stop between CMI and SFO.

How to find the cheapest flights from University of Illinois Willard Airport (CMI) to San Francisco International Airport (SFO)

  • $368 is the lowest price for a one-way University of Illinois Willard Airport to San Francisco International Airport flight. Return flights start at $448. These prices can change depending on demand.

  • To pick up cheap tickets from CMI to SFO, book ahead. Airlines tend to offer lower fares when flights are first released.

  • Finding cheap flights from University of Illinois Willard Airport to San Francisco International Airport is more likely if you can be flexible with your travel plans. Use the 'Whole month' function to see the best prices across every month and land a great deal.

  • Getting your hands on cheap flights from CMI to SFO is a piece of cake with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know when a new discounted fare appears.

  • Select your ideal departure and arrival times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to get the best deals on flights from University of Illinois Willard Airport to San Francisco International Airport.

Handy information about University of Illinois Willard Airport (CMI)

  • CMI's address is One Airport Road.

  • 81.28% of flights departing from University of Illinois Willard Airport reach their destination as planned. Given its dependable on-time performance, you're unlikely to face delays when taking off from CMI.

  • University of Illinois Willard Airport is around 7 miles from central Champaign. If you're driving, ride-sharing or catching a cab from the center, it'll take 15 minutes or so to arrive, depending on the traffic.

  • The journey on public transport will take about 1 hour 20 minutes.

  • Looking for a place to stay before your flight from University of Illinois Willard Airport to San Francisco International Airport? Consider Holiday Inn Champaign. Enjoy a good night's rest here before heading to CMI.

Arriving at San Francisco International Airport (SFO)

Getting from San Francisco International Airport (SFO) to central San Francisco

  • San Francisco International Airport is roughly 13 miles from the center of San Francisco. The drive time takes around 20 minutes.

  • If you're using public transport, expect a journey of around 45 minutes.

When to fly to San Francisco International Airport (SFO)

  • It's time to choose your trip dates for your flight from University of Illinois Willard Airport to San Francisco International Airport. August is the most popular month to head to San Francisco. If you're after a quieter vibe, go in February.

  • The warmest month in San Francisco is September, with temperatures ranging between 54ºF and 72ºF. Book your flights from University of Illinois Willard Airport to San Francisco International Airport in this month if this is the type of weather you like.

  • January has average temperatures of between 43ºF and 61ºF. Search for cheap tickets from CMI to SFO around that time if you like cooler conditions.

Explore more of United States

  • San Francisco has its own special appeal, but there are so many other corners of United States just waiting to be explored. About 40 miles south-east of San Francisco, a visit to San Jose will fill your itinerary to the brim. Start with leading attractions like Winchester Mystery House, Rosicrucian Egyptian Museum and San Jose Museum of Art.

  • If you're interested in discovering another major stop in United States, head for Fresno, roughly 160 miles south-east of San Francisco. Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden are highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.